Shawn - Actually you are incorrect. If the C rating is correct then the reason for the higher value is lower internal resistance. Which will increase the consumption rate. If you calculate the internal resistance then the voltage should be at a slightly higher rate giving more power. More power on identical battery capacities means the higher C rating pack will discharge faster.

We are talking a minor amount of course that I wouldn't worry about. If the C rating IS HIGHER(not fudged numbers) then the higher the C rating the more punch and better the pack should be.

You can find more information here - http://en.wikipedia.org/wiki/Internal_resistance